Correspondence 1978-2007; lectures 1967-1999; file on the committee that intended to make undo the entry ban to the FRG, imposed to Ernest Mandel 1976-1977; file on the committee for the release of Rudolf Bahro 1978; files regarding the Hamburger Institut für Sozialforschung, including correspondenc...

Photocopies and a few originals of correspondence, circulars, memoranda, reports and other documents, received, dispatched and collected by Jules Humbert-Droz and his wife Jenny, concerning the origin and the foundation of the communist parties in France, Italy, Belgium, Portugal, Spain, Switzerland...